Slitting device



Aug. 25, 1931. R. Moc. .loHNsToNE SLITTING DEVICE 5 4Sheets--Shee'c l Filed Oct. 17, 1929 nuentoz W Aug 25, 1931.

R, Mec. JoHNsToNE SLITTING DEVICE Filed Oct. 17, 1929' 5 Sheets-Sheet 2 wvewtoz Aug. 25, 1931. R. Moc. .JOHNSTNE SLITTING DEVICE Filed Oct. 1'7, 1929 3 Sheets-Sheet 3 u @wwwa/WQ@ Patented Aug. 25, 1931 UNr'rED STATES PATENT OFFICE ROBERT MCC. JOHN STONE, OF SHORT HILLS, NEW JERSEY, ASSIGNOR TO CAMERON MA- CHINE COMPANY, OF BROOKLYN, NEW YORK, A. CORPORATION OF. NEW YORK SLITTIN G- DEVICE In the art of slitting, as heretofore practiced, it has generally been customary to mQunt one of the slitting members on'a rotatable shaft extending transversely of the machine. So long as the machine was not very wide and did not run at high speeds this arrangement was satisfactory. However, with the advent of machines running at high speeds and operating on very wide webs of flexible material, it has been found that long transverse shafts tend to flex somewhat and to impart vibrations to the slitting elements .-a condition that affects the slitting operation adversely.

This invention has for its main object and feature the reduction .of vibration of the slitlting elements in relativel wide machines.

In the accompanying rawings, the invention is disclosed in several concrete and preferred forms in which:

Fig. 1 is a view looking in the direction of arrow l of Fig. 2, generally speaking in front elevation with parts broken away, 1n section and/or omitted, showing parts of a slitting nachine embodying one form of the invenion; Y

Fig. 2 is a cross-sectional view substantially on the plane of line 2 2 of Fig. l;

Fig. 3 is a cross-sectional view substantially on the plane of line 3-3 of Fig. 1

Fig. 4 is a detail sectional view substantially on the plane of line Hbf Fig. 2;

Fig. 5 is a cross-sectional view similar to Y Fig. 2 but showing a modified form of slitting means; and

Fig. 6 is a detail sectional view substantially on the plane of line 6`6 of Fig. 5.

The winding means, if any, may take many suitable forms,4 but as an there is shown here two winding drums 10 by means of which the slitted sections of web material are wound in a manner well understood. 11 indicates a rotatable driving member extending transversely of the machine and suitably. supported adjacent its ends.

This driving member is here in the form of a'. long gear that may receive motion in any suitable way as by means of an intermediate Apinion 10,meshing with a gear 10a on one of the winding drums and with a pinion 1()b `mitted to the slitting element. In

exemplifcation on the end of member 11. 13 is a non-rotat ing support of ample proportions, here substantially semi-circular in form, extending transversely of the machine adjacent to the driving member. 16 indicates a bracket mounted 4on the free ends, 25, of the support, said free ends constituting rails extending transversely of the machine. Bracket 16 carries a rotatable slitting element 18, here a shear cutter, on a spindle 17 and suitable transmission means are provided whereby the motion of driving member 11 is transthe form here shown, spindle 17 carries a gear 19 meshing with pinion 20, which latter engages driving gear 11. It will now be understood that bracket 16 can be adjusted transversely on the support, and that the slitting element will be driven from driving gear 11 in the different adjusted positions of the bracket. i It is, of course, not necessary that pinion 20`reinain in enga-gement with gear 11 during the adjustment, but it is convenient to treat bracket 16 and its appurtenances as a slitting unit with pinion 20 slidably related to gear 11 as the unit is adjusted along the face of said gear 11. For in this Way the unit other units can be added or removed at will with a very slight amount of work. 26 is a set-screw to bind the bracket on when the desired adjustment has been effected. Cooperating with shear cutter 18 is a complementary slitting element 22 of wellknown form, which element is freely rotatable and is transversely adjustable on rod 27.

' 14 indicates a steady-rest conveniently mounted .on support 13 and adjustable transversely of the machine in a manner analogous to the adjustment of bracket 16. This steadyrest has a semi-oircular extension 14 with which is'associated a cap 14', the two together constituting a bearing, the parts of which are bolted together at 28, for a freely rotatable shoulder collar 15. This collar` may have a smoothv base that engages the face of gear 11, but preferably said collar is invl the form of an internal gear surrounding gear 11 and capable of sllding thereon. It will now be evident that not only can the slitting can not only be readily "adjusted, but

the support From the foregoing it appears that the driving member can be sustained at different `l` points to suit the slitting operation and that, by reason of the intermediate sustaining means, the vibration 0f said shaft is minimized; further that by mounting the slitting unit on a non-rotating support instead of on the driving member, said slitting unit will not have imparted to it to any appreciable extent any vibration that may occur in the driving member.

The slitting elements per se may vary widely. In Figs. 1, 2 and 4 are shown overlapping shears of the type known as Koegel slitters. In Figs. 5 and 6, the slitters are of the score-cut type, spindle 17 carrying a backing roller 30 with which engages a scorecutter 31. It may be noted that, when the score-cut type of slitter is used, the backing roller should preferably be driven at the surface speed of the web. v

I claim:

1. In a slitting machine: a transversely extending rotatable driving member having a transversely extending uniterrupted driving surface, a transversely extending support adjacent thereto, a bracket transversely adjustable on the support, a rotatable slitting member on the bracket, and transmission means, also on the bracket, to engage different portions of the driving surface of the driving member in dierently adjusted positions of the bracket and to transmit its motion to the slitting member.

2. In a slitting machine: a transversely extending rotatable driving gear, a transversely extending support adjacent thereto, a bracket transversely adjustable on the support, a rotatable slitting member on the bracket, and transmission means, also on the bracket, includingV a pinion to engage different portions of the surface of the driving gear in differently adjusted positions of the bracket and to transmit its motion to the slitting member.

3. In a slitting machine: a transversely extending rotatable driving member mounted adjacent its ends and having a transversely extending uninterupted driving surface, a transversely extending support adjacent thereto, a bracket transversely adjustable on the support, a rotatable slitting member on the bracket, transmission means, also on the bracket, to engage different portions of the driving surface of the driving member in differently adjusted positions of the bracket and to transmit its motion to the slitting member, and a transversely adjustable steady-rest to sustain the driving member intermediate its ends.

4. In a slitting machine: a transversely extending rotatable driving gear mounted adjacent its ends, a transversely extending support adjacent thereto, a bracket transversely adjustable on the support, a rotatable slitting member 0n the bracket, transmission means, also on the bracket, including a pinion to engage the driving gear in differently adjusted positions of the bracket and to transmit its motion to the slitting member, and a transversely adjustable steady-rest to sustain the driving gear intermediate its ends.

5. In a slitting machine: a transversely extending rotatable driving gear mounted adjacent ts ends, a transversely extending support adjacent thereto, a bracket transversely adjustable on the support, a rotatable slitting member on the bracket, transmission means, also on the bracket, including a pinion to engage the driving gear in differently adjusted positions of the bracket and to transmit its motion to the slitting member, and a transversely adjustable steady-rest to engage, in its differently adjusted positions, the face 0f the driving gear, to thereby sustain said driving gear intermediate its ends.

6. In a slitting machine: a transversely extending rotatable driving gear mounted adjacent its ends, a transversely extending support adjacent thereto, a bracket transversely adjustable on the support, a rotatable slitting member on the bracket, transmission means, also on the bracket, including a pinion to engage the driving gear in differently adjusted positions of the bracket and to transmit its motion to the slitting member, and a transversely adjustable steady-rest including a freely revoluble internal gear to engage, in its differently adjusted positions, the face of the driving gear to thereby sustain said driving gear intermediate its ends.

Signed at the city of New York, in the borough of Brooklyn, county of Kings, and State of New York, this 9 day of October,

ROBERT McG. JOHNSTONE. 

